Page 53 - Threading_Handbook

Drophead Tools Suitable for External Threading
THREAD TURNING

Drophead tools are designed to be held in an upside-down position, keeping the height of
the cutting edge at the same level as regular tools without having to change the clamping in
the turret and allowing machining close to the tail stock.
In many operations, it is beneficial to use the drophead in an upside-down position to help
remove chips more effectively.

Basic Dimensions of Drophead Tools

HF H

LH
WF B
LF

LH — Head length
HF — Functional height
H — Shank height

B — Shank width

WF— Functional width
LF — Functional length

Main Advantages
• Allows machining close to the tail stock
• Allows upside-down threading production

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